Ring joint grinding mechanism



Dec. 2,1947. E. A. SMITH RING JOINT GRINDING MECHANISMv Filed oct. 23, 1945 In fnac/far Patented Dec. 2, 1947 UNIT Eo STATES. PATENT o FP1 c E RINGTJOINT; GRINDINGIMECHANISM. Edgar'A. Sinitlr, Himtngtomreg: Application: Gotcha-23, 1945;., Seria-l No.y 623,987"

(Cl. 51e-26);

'Ehisi invention relates to a grindingQmechaF nism., and. more particularly to-a mechanismior.

grinding ring joints.`

An. object of. this invention is toprovideanim.-

proved ring. joint. grinder having.v a. power` dri-ve..

and being. adjustable for dilerentv size rings and joints.-

Another object of thisinvention..isto. provide ating. joint4 grinding. mechanismiwhichis adapt-- ed` tor. power grinding. of. ring; joints .aroundfholes in. boilers and the like,4 and. whichv is held.A in? positionby anchor legs.

Itisa further object. of thisinvention. to provide for animproved grinding mechanism-for ring.

joints having means for holdingy different size, ringsI and. means. for. applying yielding pressure.

during.. grinding. to produce even pressure at all times.

Other. objects of this invention. willappear from.

through theA anchor plate showing. the notchesin..

the leg members.

Referring. to the drawingthe anchor framedenoted generally by the numeral'. I has two anchor legs 2 having inwardly extending anges: 3, at.

the'top` and outwardly extending anges 4 at the bottom. A top plate 5, supported by flanges 3 connect the legs 2' together, The top plate 5 has slots 6 therein, and bolts I pass through the slots 6 and holes in the flanges 3' to hold the.

anchor frame together. The slots IiV provide for adjustment ofthe Spacing between' the'v legs 2 depending on the size of the joint to be ground.

Apertures in the lower lian-gee@ provide forbol-t'sv or studs 8'l for anchoring theframe I over the joint to'be ground ina-boilerror pipe 9. The-ancher frame I may thus be bolted to the side of a boiler or to a pipe flange.

A drive shaft I D having a drive fitting II at the top for connection to any suitable power source passes through an aperture I2 in the center of anchor plate 5. The lower portion of shaft "illL I0 isf threadedpas at. I3',and the shaft IIT ispro.-

vidediwith: nuts. |14 and I5. for anchoring. a. topi! plate. I5Y infxedposition, and a nut I'I for. supportingalbottom spreader plate I8-in adjustable position; The periphery of the spreader plate is. provided with three. notches I9.for receiving three.

leg members 2Il-thetops of which are removably inserted in apertures 2| in the top plate I6. The., tops: of, the leg, members 2IJ are turned out as. at4

22 for better anchoring in the top plate I6.. By

turning nut I-'If, the spreader plate. I8. may be. raisedI or lowered to adjust the spreading of the.

legi-members-ZU.

The' lower endsA of the leg members 20. are` notchediasat.' 23Qfor receiving a ring 24* which is.. tobe ground in. Adjusting the position of thespreader plate I8. enables the leg members 20 to4 clamp different sizes of rings. A` ring` 25 is fixed ton the drivelshaft I0- above plate I6 by'meanszof a set` screwv 26. between thering 25.r and the frame plate 5, produces,` yielding downward pressure on the shaft which is'l transmitted` tol the leg member-s 2D wedged. between, upperv plate I6 and spreader plate Iandthereby-to'the ring 24` to be ground in.. Thus even pressurewill be applied to the ring 2li:` To insure` the springy pressure being trans,-

mittedl to: the leg members 2U; the leg members' Enraybe notchedwhere, they enter holes 2-I, to`

form.. abutmentsH engaging the. lower surface of.` the: plate I-Bf.. Each off the leg members 20, Figs ure: 5, is-iprovidedV with a notch 25;

In operation the ring 2t to be ground isf placed. around: the notches 23 of the expanding: 1 leg. members 2l1,the,nut I'I' is tightened. to force spreader'pl'ate I8.up to expand' the leg members,

2lb and; cause the ring 24 to beaclampedtightly' and centered at the same time. The anchor legsI Barefthenzpl'aced over the. studs or bolts 8 aroundA the.holeirrthe boiler andanchored down. Grind'- ing compound isf then appliedV to the under surface of. the'ring 211. andl power is applied to shaft I0' t'o.- ro'tat'e the plate I6. and the leg members. 20

togrifnd inthe ring 24F. The mechanism is adapt` ed for' grinding both. bevel and. nat joints. The".

sever-ai apertures` 2IIJ enable selective placing of! the leg members 2-0 to take dilerent ring sizes;

Itisfevident that asimple devicehas been provided for grinding ring joints andi whichI will result in a great saving of labor.

While a certain specific embodiment of this invention has been shown it will be understood that various modications may be made within the spirit of the invention. Therefore no limitations on the invention are intended other than They coil spring 2l,v positioned` are imposed by the scope of the appended claims.

1. In a mechanism for grinding ring joints, an anchor frame embodying a pair of opstanding legs spaced from each other, a horizontally disposed plate resting upon the top ends of said legs and connected to the latter, there being a centrally disposed opening extending through said plate, means on the lower ends of said legs for connecting same over a joint to be ground. a drive shaft extending through the centrally disposed opening in said plate and having one end projecting beyond the face of said plate and the other end projecting beyond the opposite face of said plate, the other end of said shaft being threaded for a portion of its length, said threaded portion extending from the free edge of the other end of said shaft and terminating at a point substantially midway of thelatter, an anchor plate provided with a plurality `of radially disposed groups of spaced openings mounted on said shaft and xedly secured thereto adjacent the termination point of its threaded portion, a spreader plate provided with a plurality of spaced peripheral notches on said shaft adjacent the free edge of said other end and mounted for slidable longitudinal movement therealong, a plurality of vertically disposed leg members spaced from each other and connected to said anchor and spreader plates, the upper end of each of said leg members extending through an opening of each of the radially disposed groups of spaced openings in said anchor plate, each of said leg members being in embracing relation with a complemental peripheral notch in said spreader plate, the lower end of ,each of said leg members being provided with means for the reception of a ring to be held thereby, and means on said shaft in association with said spreader plate for slidably moving the latter longitudinally upwardly and downwardly along the vshaft to thereby increase and decrease the spreading of said leg members.

2. In a mechanism for grinding ring joints, an anchor frame embodying a pair of upstanding legs spaced from each other, a horizontally disposedl plate resting upon the top ends of said legs and connected to the latter, there being a centrally disposed opening extending through said plate, means on the lower ends of said legs for connecting same over a joint to be ground, a drive shaft extending through the centrally disposed opening in said plate and having one end projecting beyond the face of said plate and the other end projecting beyond the opposite face of said plate, the other end of said shaft being threaded for a portion of its length, said threaded portion extending from the free edge of the other end of said shaft and terminating at a point substantially midway of the latter, an anchor plate provided with a plurality of radially disposed groups of spaced openings mounted on said shaft and xedly secured thereto adjacent the termination point of its threaded portion, a spreader plate provided with a plurality of spaced peripheral notches on said shaft adjacent the free edge of said other end and mounted for slidable longitudinal movement therealong, a plurality of vertically disposed leg members spaced from each other and connected to said anchor and spreader plates, the upper ends of each of said leg members extending through an opening of each of the radially disposed groups of spaced openings in said anchor` plate, each of said leg members being in embracing relation with a complemental peripheral notch in said spreader plate, the lower ends of each of said leg members being provided with means for the reception of a ring to be held thereby, means on said shaft in association with said spreader plate for slidably moving the latter longitudinally upwardly and downwardly along the shaft to thereby increase and decrease the spreading of said leg members, and a resilient means on said shaft for yieldably urging said leg members downwardly,

3. In a mechanism for grinding ring joints. an anchor frame embodying a pair of upstanding legs spaced from each other, a horizontally disposed plate resting upon the top ends of said legs and connected to the latter, there being a centrally disposed opening extending through said plate, means on the lower ends of said legs for connecting same over a joint to be ground, a drive shaft extending through the centrally disposed opening in said plate and having one end projecting beyond the face of said plate and the other end projecting beyond the opposite face of said plate, the other end of said shaft being threaded for a portion of its length, said threaded portion extending from the free edge of the other end of said shaft and terminating at a point substantially midway of the latter, an anchor plate provided with a plurality of radially disposed groups of spaced openings mounted on said shaft and fixedly secured thereto adjacent the termination point of its threaded portion, a spreader plate provided with a plurality of spaced peripheral notches on said shaft adjacent the free edge of said other end and mounted for slidable longitudinal movement therealong, a plurality of vertically disposed leg members spaced from each other and connected to said anchor and spreader plates, the upper end of each of said leg members extending through an opening of each of the radially disposed groups of spaced openings in said anchor plate, each of said leg members being in embracing relation with a complemental peripheral notch in said spreader plate, the lower end of each of said leg members being provided with means for the reception of a ring to be held thereby, rotatable means embodying a threaded member on said shaft in association with said spreader plate for slidably moving the latter longitudinally upwardly and downwardly along the shaft to thereby increase and decrease the spreading of said leg members, and a coil spring operatively connected to said shaft for yieldably urging said leg members downwardly.

EDGAR A. SMITH.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 527,748 Hill Oct. 16, 1894 533,863 Brandes Feb. 12, 1895 

